Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5b80c3c743e30f…

MALICIOUS

PDF

52.9 KB Created: 2020-08-14 11:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f25dda94a7d107c615f1238e9a8f8525 SHA-1: 521d8a2022bb852bb2a49f42411ec2551a9e863b SHA-256: bc5b80c3c743e30f01f85a7fdb1abcd3d677e430ca51e117caa4bd577814a36f
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=darius+lol+guide'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the string 'Darius lol guide', suggesting a lure to entice users to click the malicious link. No scripts were extracted from this sample.

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=darius+lol+guide
    • http://files.plymouthfamilynetwork.com/uploads/1/3/0/9/130969939/mofamakewanaxu.pdf
    • http://files.simpleandsplendid.com/uploads/1/3/1/4/131453998/763455.pdf
    • http://poguzid.soundsofworship.com/uploads/1/3/1/4/131482975/tosutol.pdf
    • http://files.bookcellarlwonline.com/uploads/1/3/1/8/131860787/xejapami.pdf
    • http://rifiguju.streetcorephotography.com/uploads/1/3/0/8/130814328/5456293.pdf
    • http://files.plymouthfamilynetwork.com/
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/list_of_centroids.pdf
    • https://cdn.shopify.com/s/files/1/0430/6088/7705/files/kozedavirogikubelop.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/nitagavejubiwenaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8246/4928/files/bagimajedogekogoruxaxugut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikodizexosuva.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/mussolini_fascism.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/pdf_text_editing_software_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2829/9427/files/95259535762.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/21472693355.pdf
    • https://cdn.shopify.com/s/files/1/0433/2938/8699/files/knee_pain_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6992/files/83353222195.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/satumuk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007349.bin
aeb3ce7588c2239d41ff9704c3757c06265e3b4e528a104d72f1bcc3e2e09a07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7349 4992 bytes
font_01_sfnt_off0000844d.bin
8b0cf9a9b35678bd55efcc9294f0eb543866aecf23e3cb8c6eef3f83938be37d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x844D 14084 bytes
font_02_sfnt_off0000b0d7.bin
51babe3b44e703ca5a92278b053c112c5c116674d3b708c8e2cb3e4aa6bd9a04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D7 16148 bytes

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