Malicious PDF — malware analysis report

Static analysis result for SHA-256 b07938ab1ba38188…

MALICIOUS

PDF

62.1 KB Created: 2020-08-19 05:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 877d938de1cabbce90b1526037e280f2 SHA-1: 2ff7bf21b143df0d63467f66789df1d75caf80ff SHA-256: b07938ab1ba38188dc77316f4ce2cf3c2b825290612a4e8c19216c625fd78d53
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with one prominent link pointing to a redirector that attempts to deliver an 'adblock paid apk'. This suggests a lure for potentially unwanted applications or malware. The document body, though heavily obfuscated, contains the malicious URL and references to adblocker software, reinforcing the observed attack pattern. No scripts were extracted, limiting the analysis to the PDF structure and embedded links.

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=adblock+paid+apk
    • http://filelel.myfureverfrenchie.com/uploads/1/3/0/7/130740514/737633.pdf
    • http://nulufuk.makeupalchemist.com/uploads/1/3/1/8/131871578/kipagoxisubama-wixozafiki.pdf
    • http://favixipob.instinctemporium.com/uploads/1/3/1/4/131454207/luvapewevifijim_majusotulofumu_kazojopun.pdf
    • http://files.shallyns.com/uploads/1/3/1/4/131437984/bf6c23c420f0.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/11364938158.pdf
    • https://cdn.shopify.com/s/files/1/0438/6262/2358/files/complementary_filter.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/xibaregajobilamapegazu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6030/3774/files/general_topology_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/8647/8489/files/modern_high_end_valve_amplifiers.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6340/files/bumimojabebufibubowupopa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8178/files/20251195427.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/50468773999.pdf
    • https://cdn.shopify.com/s/files/1/0434/7805/7122/files/sales_process_excellence.pdf
    • https://cdn.shopify.com/s/files/1/0430/3470/6069/files/93516758391.pdf
    • https://cdn.shopify.com/s/files/1/0431/0764/7639/files/chrooma_keyboard_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/gojirodaxufuro.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f4b.bin
e62241fa57ee303496496c21d154ff999d04c6e352a7f5ded897a93d70934105
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4B 4472 bytes
font_01_sfnt_off00009e6a.bin
d39e3cb6a69c0dcfe5c300cf3e41988666bfcc7c38fed12ec691db1bd2aa92bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E6A 10668 bytes
font_02_sfnt_off0000c2dd.bin
a02b6155c8fa0830f0b8ec0246c272d8b20e4f6c2ec796a6b050b7c1cb623201
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DD 17444 bytes
font_03_sfnt_off0000dd1b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 4324 bytes