Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e69277ded26987…

MALICIOUS

PDF

38.6 KB Created: 2020-07-31 20:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e7c8e3d600d129d3768180de407e3ca SHA-1: 333bd47045282abc8cd641472e3d1d57766e2cef SHA-256: 10e69277ded26987d3aeeb967eed975bce56445d4eca6628dde0165047b102fc
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 a redirector service known for malicious activity. The document body, though obfuscated, contains a URL that is also present in the link farm, suggesting a coordinated effort to drive traffic to potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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=ford+3600+tractor+manual+download+free+pdf
    • http://files.centennialvocalmusic.com/uploads/1/3/1/1/131164462/mixax_vegexinekewakiz_sagotunexoli_vibizewuredor.pdf
    • http://files.striveacademy1.com/uploads/1/3/1/4/131483027/sexupawuvewex.pdf
    • http://files.cefnci.com/uploads/1/3/0/8/130874201/melivuxaposel_fuvukote_wisuteb_ludofurulupal.pdf
    • http://files.shawlegalservices.com/uploads/1/3/2/7/132740260/kumabafigebixo.pdf
    • http://files.adelaide-pilates.com/uploads/1/3/0/7/130739761/zijupepojumoviziwese.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5311/2735/files/mazowagakumebimulejotiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/dabafabanif.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/falumuwozaredosusaliv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/63999533414.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8428/files/gimajunezobiwamel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0432/1177/files/junusemudigimoliwije.pdf
    • https://cdn.shopify.com/s/files/1/0431/7741/0720/files/62583535900.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/23274168134.pdf
    • https://cdn.shopify.com/s/files/1/0437/5163/7141/files/48126185621.pdf
    • https://cdn.shopify.com/s/files/1/0436/0817/8845/files/45957888583.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_off000048f7.bin
e02cf4757a0f2431427b58fd2503bb1de043583aa85b3786da8a8fb2046443fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48F7 5464 bytes
font_01_sfnt_off00005b82.bin
6610902bd01eac7d10936342a5af6443fb39acd1739975fd43c0ddaf90063a6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B82 9948 bytes
font_02_sfnt_off00007d5d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5D 4324 bytes

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