Malicious PDF — malware analysis report

Static analysis result for SHA-256 af6d04587b5c9a7a…

MALICIOUS

PDF

41.4 KB Created: 2020-08-01 11:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4adb4cd6dac24420b4ea1bef1d19e597 SHA-1: b4e717fc4aee5489f70242b970efab163c94ec53 SHA-256: af6d04587b5c9a7a356418fab1aaf38ef1851cdc5f6fa716aa68bfdde45e1555
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=mercruiser+alpha+one+manual'. Another critical heuristic flags the document as a PDF link farm, with numerous links to external PDFs. The presence of these links suggests an attempt to manipulate search engine results or redirect users to potentially malicious content.

Heuristics 3

  • 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.
  • 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=mercruiser+alpha+one+manual
    • http://files.answersformylife.com/uploads/1/3/1/4/131437276/70dcb4.pdf
    • http://files.myssma.com/uploads/1/3/1/3/131383665/5522337.pdf
    • http://files.goblinoid.com/uploads/1/3/1/3/131380263/1473226.pdf
    • http://files.olgcid.org/uploads/1/3/0/7/130739210/redijedowa_sewana_buzekunatiz_xojufamozufub.pdf
    • http://files.reconnect2self.com/uploads/1/3/0/9/130969573/koselegi_puxododuzumatod_xijefebofuwem_gepeguzi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2636/files/dujerubonirefuvimifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0015/1707/files/79151808513.pdf
    • https://cdn.shopify.com/s/files/1/0435/2121/2570/files/79720032310.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/gidax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/jorejozuxipabojajipowize.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/75857288811.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/fubamibibivuzekesupejubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/kitazewuwab.pdf
    • https://cdn.shopify.com/s/files/1/0429/4888/6684/files/5837115777.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/72501019443.pdf
    • https://cdn.shopify.com/s/files/1/0430/3355/9203/files/56954477040.pdf
    • https://cdn.shopify.com/s/files/1/0434/6052/6246/files/16191394379.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_off00006251.bin
fd6105b8533512843591ac8132d373ea1e75303e77c25032948070eb97430c3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6251 5180 bytes
font_01_sfnt_off000073cd.bin
71fbb7ccad070833ca360e008063b8711510804c64473edb22922170243b8dea
pdf-font-stream PDF embedded font (sfnt) at offset 0x73CD 10776 bytes