Malicious PDF — malware analysis report

Static analysis result for SHA-256 69eeae61aa757fc0…

MALICIOUS

PDF

41.5 KB Created: 2020-08-07 03:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5f64fec577ca811357ecb18d3adb636 SHA-1: fd4f13b9a5e70a2aca8ce3875b6089b6eae63c85 SHA-256: 69eeae61aa757fc0f59fd33afeb9b15dcd78471a87c99d96cdf7f8832291dac2
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, including a redirector to 'ttraff.cc', and a direct link to a PDF hosted on 'avinumalkeinumessianicsynagogue.com'. The document body, though heavily obfuscated, contains text suggesting it is a lure for 'Advanced auditing notes pdf' and includes a call-to-action button. The presence of a remote support lure heuristic further suggests an attempt to trick the user into a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=advanced+auditing+notes+pdf
    • http://files.eatwellwithwilson.com/uploads/1/3/1/4/131412362/dawijigikilene.pdf
    • http://files.avinumalkeinumessianicsynagogue.com/uploads/1/3/1/4/131436978/maxexu.pdf
    • http://files.krgriffiths.org/uploads/1/3/0/8/130874129/96dffd9.pdf
    • http://files.musee-militaire.com/uploads/1/3/0/8/130874073/2834197.pdf
    • http://files.samanthazweben.com/uploads/1/3/1/4/131483097/vitopajukogu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/15816523674.pdf
    • https://cdn.shopify.com/s/files/1/0434/4646/8769/files/wefivilaliripa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0448/4136/9761/files/converting_to_word_document_for_editing.pdf
    • https://cdn.shopify.com/s/files/1/0432/5376/0162/files/nozaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/fijiwixebepov.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/xobonofutikibebiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/67548371139.pdf
    • https://cdn.shopify.com/s/files/1/0431/1921/4758/files/ruby_warrior_level_4.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/73034990956.pdf
    • https://cdn.shopify.com/s/files/1/0440/7151/8373/files/31875173993.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_off00006557.bin
070de4cf21e21509121c792e526b4802367fe22393680ba8ffbd20632390212f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6557 5244 bytes
font_01_sfnt_off00007751.bin
93a48ad68df39ebe76a2df2ba7df1918b6e695ef7b3d2c06362363a8cc96a727		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7751 9996 bytes

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