Malicious PDF — malware analysis report

Static analysis result for SHA-256 55809dc73b269bd3…

MALICIOUS

PDF

48.3 KB Created: 2020-08-06 03:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a22a22cb6ee832d15529a7cbd5a8c065 SHA-1: f492d401bc8e4646b506420fbc04881356738476 SHA-256: 55809dc73b269bd3107205fd59e6aa097b99ea3acfa46c8b765e60309b41ff4c
128 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as a download for a programming book. The document body also contains the same URL, reinforcing the lure. The presence of a visual download button heuristic further supports the social engineering aspect of this attack. The file is identified as a PDF, and the primary malicious indicator is the redirector link.

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.
  • 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
  • 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.com/pify?keyword=learn+python+3+the+hard+way+4th+edition+pdf+download
    • http://files.dinhhoaitram.com/uploads/1/3/0/7/130739263/bd1e59e5122caf9.pdf
    • http://files.aliceannephotography.com/uploads/1/3/1/3/131379447/xisejexopore.pdf
    • http://gexuk.thefireworkshack.com/uploads/1/3/1/0/131070711/8231015.pdf
    • http://files.hardcorefishing.us/uploads/1/3/1/4/131438869/4356027.pdf
    • http://woxus.drjolieweingeroff.com/uploads/1/3/2/8/132814930/4bd475ff31.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/lich_s_eye_bullets.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/xazog.pdf
    • https://cdn.shopify.com/s/files/1/0430/6681/8721/files/24355266102.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/dopetemexowepikuzenopili.pdf
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/tobipazogujasozik.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/31454075559.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3907/files/xemosakudowageguron.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/34776553449.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/buwutonaziditozi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4586/9985/files/31847019527.pdf
    • https://cdn.shopify.com/s/files/1/0432/8577/4502/files/72501489274.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/lawn_mower_spark_plug_gap.pdf
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/14686474761.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_off00007e75.bin
a154d23f59ecfb9798a5a1203ecd2c38f3fa370cdb3a26e0b8d6ba317e6e6375
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E75 5336 bytes
font_01_sfnt_off000090c0.bin
9ca54334e87c6847ba2f1568007dc8cdbc8f22d484860f3f44bb18c46fb1e121
pdf-font-stream PDF embedded font (sfnt) at offset 0x90C0 10192 bytes