Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a419c6b377b3266…

MALICIOUS

PDF

53.5 KB Created: 2020-08-23 00:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adf68cd14c102c3774202e9363e74d78 SHA-1: ba0205e912a503fbc3e24119f5ebd8340d1610d5 SHA-256: 7a419c6b377b32662746b14498fe3414b83be36514e1ae71ed8989ccafaffee1
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'Hsc result 2018 bd marksheet with number' and a URL that appears to be a lure. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or content stuffing technique to obscure malicious intent. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=hsc+result+2018+bd+marksheet+with+number In PDF document text
    • http://files.antonybolante.com/uploads/1/3/2/6/132681307/gojaresizidobi_pizepidaxa.pdfIn PDF document text
    • http://files.tuitionaxcel.com/uploads/1/3/1/4/131408502/99a3021a26a874.pdfIn PDF document text
    • http://files.thestudentcentre.net/uploads/1/3/0/7/130739456/leregopeku.pdfIn PDF document text
    • http://files.beautythebookandtheblog.com/uploads/1/3/0/7/130774990/5c0bbef413b74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4261/9035/files/survey_of_accounting_edmonds_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/68791224461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/nowibip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6083/0108/files/86411502258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/pobiwewomutomopizavigal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/80016133039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1294/0188/files/kabixudozivujaliveje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/terraform_iam_role_aws_managed_policy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/bowirasibupaxizal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/7737204377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74098669839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0599/1322/files/adobe_pack_su.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/ieyenews_word_search_math_terms_answers.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e26.bin
16de0151cc0c3cc1f2531421c136be5093870aecc7cb8ac12fdbde1dae603263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E26 5956 bytes
font_01_sfnt_off0000824d.bin
1fea0f2df13e6c57aca666e40e084a2ec98171f4c2b6415836599ca686d8bbfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x824D 9248 bytes
font_02_sfnt_off00009fa6.bin
a95f15b91b047047c227cfa2a261cceee695f07d55ee0e90670fcaacc322c5f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA6 12888 bytes

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