Malicious PDF — malware analysis report

Static analysis result for SHA-256 078dcd47f997f719…

MALICIOUS

PDF

41.2 KB Created: 2020-08-21 23:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f776e81320d59289d55dca22620b9780 SHA-1: 4dbec25487948dc60616b6abeb41b3a8568d0d40 SHA-256: 078dcd47f997f719b60741eb8e12f35a6e5acc540bb7d79556ca969352f03853
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One of the primary links directs to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains a URL that matches the redirector, reinforcing the 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/pify?keyword=principles+of+microeconomics+chapter+13+answers
    • http://xeleke.sailabilitybatemansbay.com/uploads/1/3/2/6/132696067/e3894.pdf
    • http://jajob.cathyskendrovich.com/uploads/1/3/0/7/130775897/32be42d82642c8c.pdf
    • http://xuvumezel.gladewaterathleticbearbooster.club/uploads/1/3/0/7/130739654/bafizijobavasizad.pdf
    • http://rewilul.wstcharity.com/uploads/1/3/1/6/131606295/sureme_xekoz_tufigunonoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/xakukifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7587/0630/files/87282437121.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xakikalimakimoxe.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/16898642138.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/58089180189.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/autoestima_psicologia_comportamentale.pdf
    • https://cdn.shopify.com/s/files/1/0431/4791/9522/files/wimegunixotufera.pdf
    • https://cdn.shopify.com/s/files/1/0435/0682/7428/files/wujoxefa.pdf
    • https://cdn.shopify.com/s/files/1/0440/6588/2277/files/dumbbell_workout_routine_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0440/5651/0616/files/bncc_educao_infantil.pdf
    • https://cdn.shopify.com/s/files/1/0437/3184/5271/files/surf_conditions_atlantic_beach_nc.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/zunakubed.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_off00005fc4.bin
f5812d4dba77d04f4c62c7570412d25891f1a96b3a62334e5908a4ed04f9d455		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC4 5564 bytes
font_01_sfnt_off00007294.bin
130657e8130617b3f96970b0b05dcc983d8996c0b3625e4e661898e36af708bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7294 10896 bytes

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