Malicious PDF — malware analysis report

Static analysis result for SHA-256 1863d62eae280415…

MALICIOUS

PDF

44.5 KB Created: 2020-08-22 11:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec327603754f366f52e42a3b484f6f2a SHA-1: 11e0d5855cb4f86e55252d798f1e7b261165aac0 SHA-256: 1863d62eae2804155a9ce501ff20e8d05831c037257a78ce8d58c6c25498d77f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though obfuscated, contains text suggesting it is a report, likely a lure. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL points towards a phishing or malware distribution attempt.

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=axel+springer+se+annual+report+2016
    • http://files.binhamvillagehall.co.uk/uploads/1/3/0/7/130775868/f9625a.pdf
    • http://files.giamillerwrites.com/uploads/1/3/1/1/131163620/tilolot.pdf
    • http://gexuzutog.lowflying.net/uploads/1/3/2/6/132680974/ca2ed5b.pdf
    • http://zosuv.groundedplantandfloral.com/uploads/1/3/0/8/130813528/718789.pdf
    • http://files.langleycyberpatriot.org/uploads/1/3/1/6/131606965/venumemonu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2421/0326/files/16720541674.pdf
    • https://cdn.shopify.com/s/files/1/0437/5520/8858/files/effect_of_alloying_elements_in_copper.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8801/files/33801509941.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/zitupapadudiredofovajik.pdf
    • https://cdn.shopify.com/s/files/1/0429/9289/4105/files/ruxabizite.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/jujebiwigareranusamalutad.pdf
    • https://cdn.shopify.com/s/files/1/0439/2163/7544/files/android_phonegap_tutorial_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7201/files/craftsman_motorcycle_jack.pdf
    • https://cdn.shopify.com/s/files/1/0432/2128/7080/files/69360354364.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/afternotes_on_numerical_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0429/7487/1711/files/57455370978.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/parestesia_causas.pdf
    • https://cdn.shopify.com/s/files/1/0439/1239/6968/files/bhajan_free_mp4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ee7.bin
c02b95b237c98f830ec57602025575900c1b367c0b365200096efef360b2d6b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE7 5524 bytes
font_01_sfnt_off000081c8.bin
11577b1c81f2317e7e15df1ee7684e15e1872e37477bd4f8cf0d95a78d75f3cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C8 10372 bytes

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