Malicious PDF — malware analysis report

Static analysis result for SHA-256 362c5bff1d11c7ce…

MALICIOUS

PDF

42.9 KB Created: 2020-08-09 17:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5abe06f87549bd5901a63ac789af7eb SHA-1: 10f0101b51803b0d46c40a865375b2d319a1b43a SHA-256: 362c5bff1d11c7ce2882cf19e5ee7d22eca18a56c358e6f269e55cd251060120
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to 'management of diabetes mellitus type 2 pdf' and the malicious URL. The presence of many Shopify-hosted PDF links suggests a link farm SEO poisoning technique to attract victims. No scripts were extracted, but the primary attack vector appears to be luring users to a malicious site via embedded links.

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.com/pify?keyword=management+of+diabetes+mellitus+type+2+pdf
    • http://files.mmsilkscreen.com/uploads/1/3/1/8/131859261/c3bdba9ae6d.pdf
    • http://files.powerandposition.com/uploads/1/3/0/7/130738620/sekesofuwu.pdf
    • http://files.rickydavislegacyfoundation.org/uploads/1/3/1/6/131637773/6417494.pdf
    • http://files.rsconcerts.org/uploads/1/3/2/7/132710763/5452169.pdf
    • http://files.spiritblossomspsychics.com/uploads/1/3/1/3/131380456/c14c4b084d0.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/fast_food_restaurant_business_plan_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9841/files/botedesakamoxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/entrepreneurship_development_notes_for_mba.pdf
    • https://cdn.shopify.com/s/files/1/0447/5482/9463/files/1001_arabian_nights_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/21868205658.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/troybilt_tiller_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kiragin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/40407854994.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/64485598222.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/vatevewarowudul.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4594/files/passion_translation_bible_free_download.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_off00006881.bin
20e433b53fe4ad54c628f30b304f375142f2bbf074002c9305c584f771795a0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6881 5644 bytes
font_01_sfnt_off00007bc2.bin
27d1a1afeaa02eabad72c13011ea87508579fc1b86e4b91dfa1d3aa97475cef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC2 10196 bytes

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