Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f06e3ed209872f…

MALICIOUS

PDF

41.0 KB Created: 2020-09-03 06:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fc2e4d17bcd59cfae775db3b834ea5a SHA-1: 5358fff4716c1f17a19c0d26269d50ca63fda0b4 SHA-256: 62f06e3ed209872fdd539dc6a6612ae375d103de562fa90a0e946cb573f7962e
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains keywords related to the redirector's query, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm used for SEO poisoning to drive traffic to malicious sites. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/wix?keyword=how+to++netflix+on+macbook+offline
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5106/4228/files/7444014962.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/ramiwokiraja.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/agnisakshi_movie_full_hd_video.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2069/files/cheer_uniform_for_baby.pdf
    • https://cdn.shopify.com/s/files/1/0439/0574/5051/files/25622660110.pdf
    • https://static.usrfiles.com/ugd/f1780b_7a56fe0fe24b429d86e222ed991d0ac7.pdf
    • https://static.usrfiles.com/ugd/4c76bf_b89a52ae238b413eacff65c3298d319a.pdf
    • https://static.usrfiles.com/ugd/1decf9_2ba5023f30714efbb4b52707efca0ab9.pdf
    • https://cdn.shopify.com/s/files/1/0428/1889/6038/files/21893651165.pdf
    • https://cdn.shopify.com/s/files/1/0435/5781/4431/files/allen_test_series_jee_advanced.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5830/files/15400534812.pdf
    • https://cdn.shopify.com/s/files/1/0432/5428/4450/files/latifurabozopas.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006257.bin
ca4e26b990db8312eef6e2b158754e06fbc78b0c23284ca5f6d456eac676315d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6257 5076 bytes
font_01_sfnt_off000073a5.bin
31f42f40d838aeaaaecaf2b881e41ec8b891bd4c607256510bb48807e8998be9
pdf-font-stream PDF embedded font (sfnt) at offset 0x73A5 10420 bytes