Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0461ab5003b40e…

MALICIOUS

PDF

42.0 KB Created: 2020-08-17 17:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc7e08409aca9509f9ca41bd8975577b SHA-1: f7998cb7170dd3df6171aff30d8175dd11b7b955 SHA-256: 6c0461ab5003b40e2c7742f627d52be58c337a42bfd8ca4876a52eaa61863c19
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text and embedded links suggest a lure related to 'chrome android history recovery', likely a phishing attempt to harvest credentials or redirect users to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=chrome+android+history+recovery
    • http://zarubefa.tatjanakusic.net/uploads/1/3/1/4/131438161/xodagomur_vamovud_xuwif_kokimalatozajax.pdf
    • http://files.csealocal859.org/uploads/1/3/1/4/131453355/vodawe.pdf
    • http://nepemup.smilingaviation.com/uploads/1/3/1/4/131406436/matomojofonekeg_xesevobituguj_sujofununeta.pdf
    • http://letotijiv.pinemountainchurch.com/uploads/1/3/1/4/131407424/771a837da6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7112/7208/files/pawudotikagenufapow.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/8230141385.pdf
    • https://cdn.shopify.com/s/files/1/0429/3040/5535/files/9252387853.pdf
    • https://cdn.shopify.com/s/files/1/0431/3359/9893/files/can_you_feel_the_love_tonight_sheet_music_trumpet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/sajonubevupijigumedewiwig.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/60020962856.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dilos.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/vujonemogir.pdf
    • https://cdn.shopify.com/s/files/1/0448/4166/4669/files/pharmacology_of_anticoagulant_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0432/0205/2257/files/12551991015.pdf
    • https://cdn.shopify.com/s/files/1/0441/1044/6744/files/birds_name_in_english_with_pictures.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_off00006641.bin
888b49387927b5b84e545e8f03a2cba441ec007177c75f5af6c60a4133eb4434
pdf-font-stream PDF embedded font (sfnt) at offset 0x6641 5216 bytes
font_01_sfnt_off000077df.bin
2aeb21e0dc41e39eca43112c714ca6b9067bfae74af5c101f6c19c08b23660b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x77DF 10416 bytes