Malicious PDF — malware analysis report

Static analysis result for SHA-256 112d1c1250171af1…

MALICIOUS

PDF

54.3 KB Created: 2020-08-05 17:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f078893d5ffd289673ed6173f0a97f4 SHA-1: 92c495c14955c04a4c012edead63e0dc519a5cd4 SHA-256: 112d1c1250171af1a374bb68d3a137bd3243d71567de241d16066ef871f4bd60
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One prominent link, however, redirects to 'ttraff.ru', identified as malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'Paleo diet tamil book pdf free download' and the malicious URL, indicating a lure to trick users into clicking the link. The presence of embedded URLs and the malicious redirector strongly suggest an attempt to drive traffic to malicious sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/pify?keyword=paleo+diet+tamil+book+pdf+free+download
    • http://files.kinderdancebrazoscounty.com/uploads/1/3/1/0/131070713/numatabatenedapus.pdf
    • http://files.harmonyorganics.net/uploads/1/3/0/8/130874265/jupokulowizoxefebom.pdf
    • http://files.latinahilara.com/uploads/1/3/1/1/131163969/6585841.pdf
    • http://bemosedej.thelastminis.com/uploads/1/3/0/7/130740178/7276244.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/2247/5687/files/ditavedip.pdf
    • https://cdn.shopify.com/s/files/1/0438/3404/8669/files/43115275247.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3833/files/sexulemezagijeparetorejuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/1116/0739/files/10995445374.pdf
    • https://cdn.shopify.com/s/files/1/0430/9935/7338/files/alter_ego_a2_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0433/8378/3575/files/38332326159.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/ween_the_pod.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/84712560192.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4551/files/29029040414.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/pogoxiwepojulotoluluker.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6037/files/kuletiwugowizisatukuf.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063b0.bin
0f0c7b24ea571fcc5465cbdb421a744badf11e8779917fcc160583cc5feb2072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B0 5096 bytes
font_01_sfnt_off000074f1.bin
ca9ba0eb467daf23f359140050e73912d2dacb9c6fba6fa6963802aeea865252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F1 16316 bytes
font_02_sfnt_off00009a05.bin
32da5e7775d3f2527b5ab11bfc0930bc57a2d26157bce84c1c01c33794d59af1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A05 9940 bytes
font_03_sfnt_off0000bbe9.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE9 4324 bytes

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