Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f80be4d9659068…

MALICIOUS

PDF

42.9 KB Created: 2020-08-08 21:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4328f120aae5ddc126d12f638ceb5a56 SHA-1: fd8d25d68c9d13e4f68e28cc0ad021c7bd8d86fe SHA-256: a5f80be4d9659068fecc91f49b3927ac31f022eb84add98800053a4644f912a4
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the text 'Physics laboratory apparatus pdf' and the malicious URL, suggesting a lure to trick users into downloading potentially harmful content. The presence of numerous Shopify-hosted PDF links further indicates a link farm designed to improve SEO for 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.cc/pify?keyword=physics+laboratory+apparatus+pdf
    • http://files.nataliecdavis.com/uploads/1/3/1/4/131407849/a3e596.pdf
    • http://muzufe.laurellesparks.com/uploads/1/3/0/9/130969723/sikanedafide-vejuresitaxozo.pdf
    • http://files.missionpilgrims.com/uploads/1/3/1/3/131379456/wudizugupukilat.pdf
    • https://cdn.shopify.com/s/files/1/0441/0084/5720/files/chemistry_textbook_grade_12.pdf
    • https://cdn.shopify.com/s/files/1/0433/7490/3452/files/xitutuwagija.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/datidifizodokusadaxopetog.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/doxemamegesulolulizizit.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/70981530486.pdf
    • https://cdn.shopify.com/s/files/1/0437/3023/9642/files/biwaguje.pdf
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/analogias_graficas_ejercicios_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/ceiling_design_for_living_room.pdf
    • https://cdn.shopify.com/s/files/1/0435/4247/9007/files/cambridge_primary_mathematics_learner_s_book_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/xorubogifeselosatotesag.pdf
    • https://cdn.shopify.com/s/files/1/0432/9986/4734/files/24766488256.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/fudifigakesagopavoladoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7064/files/acknowledgment_of_paternity_texas.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_off000069c0.bin
6577a640dd61301f05371243053e991cd0484fad8e9c60e65c53cf25fa26913b
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C0 5484 bytes
font_01_sfnt_off00007c5f.bin
05409985cb5370026d4e7cccbf59fc0274bc58b28e3a2ebcf47f248bb27af1dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5F 10132 bytes