Malicious PDF — malware analysis report

Static analysis result for SHA-256 42135a04d715337d…

MALICIOUS

PDF

43.7 KB Created: 2020-08-21 18:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76c3a00e2c7fe8a0fe2ecdddad5c07ae SHA-1: ddc516247f45e3ba8b52bb6465dbdcdb99a6e82d SHA-256: 42135a04d715337d6db3d4e9fb284923399862c19867962488f7d3dcc3975242
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.001 PowerShell

The PDF contains a link farm of numerous external PDF files, with a primary redirector URL pointing to a known malicious domain. The document body, though heavily obfuscated, contains text that appears to be a laboratory report abstract, likely intended as a lure. The presence of a malicious redirector and a link farm suggests an attempt to drive traffic to malicious infrastructure, potentially for further exploitation or phishing.

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.com/pify?keyword=sample+abstract+for+laboratory+report
    • http://files.lizbeckham.com/uploads/1/3/0/7/130739340/zufax-xafojizagufalo-kezodixu-zeledagef.pdf
    • http://jibekube.loveswayhealth.com/uploads/1/3/0/8/130874038/63f67a5a875.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/19229559388.pdf
    • https://cdn.shopify.com/s/files/1/0432/4143/9400/files/71065464468.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3267/files/bahubali_songs_12.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2454/files/performance_evaluation_of_bridgeless_pfc_boost_rectifiers.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8537/files/funudavozesoluwujex.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/miles_davis_kind_of_blue_zip.pdf
    • https://cdn.shopify.com/s/files/1/0462/0363/3817/files/42357394007.pdf
    • https://cdn.shopify.com/s/files/1/0435/9467/8435/files/dna_structure_worksheet_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9142/files/case_for_faith.pdf
    • https://cdn.shopify.com/s/files/1/0437/1991/7719/files/dufisusozadewepajaximuwen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82973104521.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_off00006c35.bin
7d30a121bf8030f108d3578a96a971115cc9aabf38515f84551d2a90eeea582b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C35 5508 bytes
font_01_sfnt_off00007ed7.bin
1f5593ade39061ea275fd294a5d5304e1f53d256bc941302b1b1bc70597682f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED7 10300 bytes

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