Malicious PDF — malware analysis report

Static analysis result for SHA-256 484223af7167a32b…

MALICIOUS

PDF

45.1 KB Created: 2020-08-12 16:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b1a10f189b1925c05907d1fe39a1133 SHA-1: a1ec3bfc0cfe436c125c79284ba03534eeaf4d72 SHA-256: 484223af7167a32b3eb4f59612329f06baa6ff7f0865dbd0b22ba0b8b51fe231
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'Drugs safe in pregnancy chart pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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=drugs+safe+in+pregnancy+chart+pdf
    • http://files.atlvipdetail.com/uploads/1/3/0/8/130813755/5723425.pdf
    • http://files.jodiemarvincreations.com/uploads/1/3/0/9/130969418/pemaluw.pdf
    • http://files.proteus-syndrome.org/uploads/1/3/1/4/131438234/7042657.pdf
    • http://zawoj.laroccamiahouse.com/uploads/1/3/1/4/131410812/b0866c91.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/atenea_diosa_griega.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/online_form_maker.pdf
    • https://cdn.shopify.com/s/files/1/0436/5674/1022/files/mor_the_trenchmouthed.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/wakulino.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/75898369905.pdf
    • https://cdn.shopify.com/s/files/1/0436/3180/4574/files/fozefonevojinabizat.pdf
    • https://cdn.shopify.com/s/files/1/0434/7917/1222/files/sesoretanevofejed.pdf
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/22022840430.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/mosopavemelaw.pdf
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/46308025945.pdf
    • https://cdn.shopify.com/s/files/1/0452/9192/9761/files/jezepuwewarorunofazona.pdf
    • https://cdn.shopify.com/s/files/1/0434/6930/8061/files/wazalofiwijediwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3446/0828/files/61924537634.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066d8.bin
1077338daebc040f8cba3706f3cc4a653fe0e870e07c8575aee1f026e2a6b622
pdf-font-stream PDF embedded font (sfnt) at offset 0x66D8 5488 bytes
font_01_sfnt_off00007987.bin
563172e894bec81d9a4ec8d7f8ca1bfd094139d38d8b315f16e444f974fac6d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7987 14684 bytes