Malicious PDF — malware analysis report

Static analysis result for SHA-256 6044e46403f52c31…

MALICIOUS

PDF

43.4 KB Created: 2020-08-18 18:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac3a06e26f882595208f2a2164760637 SHA-1: 3ce56949b93a1ac964efd642206c392765c3cce6 SHA-256: 6044e46403f52c311fafc36cc9bbc5273fd4534f64959d041698ad24a20ee7cf
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to the known malicious domain 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous embedded URLs and the redirection to a malicious domain indicates an attempt to lead the user to a malicious site, likely for further exploitation or phishing.

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/pify?keyword=past+continuous+examples+with+answers
    • http://files.apdcwa.org/uploads/1/3/0/7/130738673/wawulabuwaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bekikelazipilexujewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2213/9041/files/noral.pdf
    • https://cdn.shopify.com/s/files/1/0428/2220/5607/files/okuma_osp_programming_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/kring_et_al_abnormal_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/milawiwuvupinubazit.pdf
    • https://cdn.shopify.com/s/files/1/0434/9142/6469/files/preheater_cement_plant.pdf
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/gallstone_diet_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2145/8853/files/acidification_of_urine.pdf
    • https://cdn.shopify.com/s/files/1/0436/9747/1656/files/antecedentes_penales_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/3632307695.pdf
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/nufizosonebajufos.pdf
    • https://cdn.shopify.com/s/files/1/0435/8383/2227/files/bollywood_full_movies_2019_hd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f82.bin
45aaea22ead4602ce6330056154adbb4c074ae6b796b12c90d167f574c02bf28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F82 5216 bytes
font_01_sfnt_off00007112.bin
f136f742612090d2c92d174a479c299cd74e67a63cc4472fdd8ec5d27a02f632		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7112 9856 bytes
font_02_sfnt_off000092e0.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92E0 4324 bytes

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