Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1b46b07137e870…

MALICIOUS

PDF

46.1 KB Created: 2020-08-14 15:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eebbd07f3f56ec9b5741a6c90450db2b SHA-1: d6cc8b09fe800ba06293fc5a17379d3652d606ab SHA-256: fc1b46b07137e8705c3327b6ce8d1fbc2074b35c817bca8faec100bf674a28e1
130 Risk Score

Malware Insights

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

The PDF document attempts to lure the user with the promise of free book design templates. It contains a large number of embedded links, with one identified as a redirector to known malicious infrastructure. The document body itself is heavily obfuscated and contains the malicious redirector URL and numerous benign-looking Shopify URLs, likely part of a link farm to improve search engine ranking for malicious content.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=free+book+design+templates+for+word
    • http://naboloti.tangoyoung.com/uploads/1/3/1/3/131383332/eeb7ed6041a.pdf
    • http://files.lockmangenetics.com/uploads/1/3/0/7/130740260/6378717.pdf
    • http://files.chirho.consulting/uploads/1/3/1/1/131164157/7232353.pdf
    • http://files.scentsationalpamperingaccessories.com/uploads/1/3/0/7/130776489/bupepegopaju-bakokogusezebuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/jenibar.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/sominijobiwupolulis.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/jitidonanelavusopuvog.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/alagappan_clinical_medicine_6th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/zezok.pdf
    • https://cdn.shopify.com/s/files/1/0438/7789/2264/files/bestimmter_unbestimmter_artikel_daf.pdf
    • https://cdn.shopify.com/s/files/1/0444/4710/5191/files/chemical_reaction_engineering_levenspiel_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/gogit.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/78265993259.pdf
    • https://cdn.shopify.com/s/files/1/0432/9537/5524/files/98335244825.pdf
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/how_to_backup_notes_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/fozosudasupowimibidabuk.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_off00007524.bin
35fa6cc68d5b6a03879f3fb06061bd8845452f79705762ff1979c648419835bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7524 5612 bytes
font_01_sfnt_off00008834.bin
5fc11131357f33c926f6aad2a3cc0bcd321a8df149b127221c3d8104666d6dfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8834 10260 bytes