Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f963ca1fce4715…

MALICIOUS

PDF

48.2 KB Created: 2020-08-05 04:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a1d77c30d570ebe1da923756bbd19e1 SHA-1: f33fa941d3f34ebf228f5bb6b184ea0123ddac14 SHA-256: f2f963ca1fce47156babb6df43bf87d8974e73d83fcc188692e6f6051408f7f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and several other links hosted on Shopify and other domains, suggesting a link farm or redirection scheme. The primary attack pattern involves luring the user to click on these links, which likely lead to phishing pages or malware downloads.

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.cc/pify?keyword=ca%25C3%25B1amo+industrial+pdf
    • http://files.zoomerman.net/uploads/1/3/0/7/130775665/6e94abc07.pdf
    • http://bevoges.bcotmaths.com/uploads/1/3/0/8/130874253/ba308a61bb6.pdf
    • http://files.sasquatchcanada.com/uploads/1/3/2/8/132815123/fejimusabudefijag.pdf
    • http://puname.bagearoutdoors.com/uploads/1/3/2/7/132740214/vogub.pdf
    • http://files.modeesthetics.com/uploads/1/3/0/9/130969825/mabojemewelimok_jevevanuroz_kirojati_podive.pdf
    • https://cdn.shopify.com/s/files/1/0434/5508/6742/files/pesuvikexoluzebini.pdf
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/wokivunijomas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/14936797136.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/73652549887.pdf
    • https://cdn.shopify.com/s/files/1/0434/8706/8322/files/jinesitokajafiwilopule.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/62692408299.pdf
    • https://cdn.shopify.com/s/files/1/0430/7399/4905/files/58981233957.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/mass_effect_1_female_shepard_face_sliders.pdf
    • https://cdn.shopify.com/s/files/1/0435/5214/5560/files/40343058792.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/giorgio_by_moroder.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/gonirexoje.pdf
    • https://cdn.shopify.com/s/files/1/0439/1786/9211/files/18572986398.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e3e.bin
efee25de75e97dcd0f0cf4a783d38a93abc97f9343b261a741144df9f6f4bddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3E 5184 bytes
font_01_sfnt_off00007f76.bin
024cdb86f4a9c956ba2c800b8baf20b9a813274de387edfdd17a54d1bd2b1f0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F76 10668 bytes
font_02_sfnt_off0000a3a4.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3A4 4324 bytes

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