Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a63409cc8ca63fb…

MALICIOUS

PDF

43.9 KB Created: 2020-08-21 21:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95bcf0479f18bc85ac0ebcceaf1544e2 SHA-1: d96e0033bb9bee5c3851b02327ad49877c2ad39b SHA-256: 0a63409cc8ca63fb53a335e021717b00ada0f15574d33d616e01f97f4f47e88c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=abdominal+aorta+ultrasound+template'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious content as a legitimate template. The presence of a large number of external PDF links further indicates a link farm or redirection strategy, likely for phishing or malware delivery.

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.cc/pify?keyword=abdominal+aorta+ultrasound+template
    • http://files.saskhandball.com/uploads/1/3/1/3/131380627/sivaxosuzepabolujexe.pdf
    • http://files.astaseattle.org/uploads/1/3/0/7/130775971/1829537.pdf
    • http://sadegalur.thecellarfc.com/uploads/1/3/1/3/131383332/petegisuzo.pdf
    • http://dokabow.steelecanyonathleticboosters.com/uploads/1/3/0/9/130969140/8744f58b.pdf
    • http://files.thewriterandtheriver.com/uploads/1/3/1/3/131382406/bokotilexutok_rimefokuturafez_jepudo_lotur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/3914/3574/files/10424226124.pdf
    • https://cdn.shopify.com/s/files/1/0451/1078/8261/files/acknowledgement_for_group_assignment.pdf
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/62486635592.pdf
    • https://cdn.shopify.com/s/files/1/0430/6095/3249/files/fogolubojewata.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/19607115886.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/jewozulidopuribomikubag.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/jovelezivewexo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/kimav.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/certificado_de_origen_mexico_costa_rica.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/partnership_agreement_document.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8992/files/bosnian_english_dictionary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060d9.bin
312f7e45f9f9f79118cffcded3b424b3c4b53481de4e8eb8f593dfab6eb82a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D9 5116 bytes
font_01_sfnt_off00007214.bin
992c019ce6e3348c586875f7921bdba0c011ef1b80cbe971eaea24b81d1606da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7214 10112 bytes
font_02_sfnt_off0000949e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x949E 4324 bytes

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