Malicious PDF — malware analysis report

Static analysis result for SHA-256 befa38840cc95f75…

MALICIOUS

PDF

62.6 KB Created: 2020-08-22 02:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28c16f14f1ffad1811c3617bd87aed16 SHA-1: 23df9aa68b3665ce81ca686c30b626cb9336de1b SHA-256: befa38840cc95f7552fd4c72e936b4e96618bb2936f3dfbd89d4459eb36e1778
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a lure for an 'advanced excel macro tutorial'. This suggests the PDF is designed to trick users into clicking malicious links, likely leading to credential theft or malware download. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=advanced+excel+macro+tutorial+pdf
    • http://bexelufu.ledolas.com/uploads/1/3/1/3/131384281/966592.pdf
    • http://files.portsideatpanamacitybeach.com/uploads/1/3/0/8/130874379/9703973.pdf
    • http://bupadof.softcinch.com/uploads/1/3/1/3/131380504/dd7776096a0e34b.pdf
    • https://cdn.shopify.com/s/files/1/0432/7813/9556/files/computer_age_statistical_inference_algorithms.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/articles_of_confederation_1643.pdf
    • https://cdn.shopify.com/s/files/1/0446/6583/1577/files/array_and_arraylist_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/77002137244.pdf
    • https://cdn.shopify.com/s/files/1/0437/0972/6870/files/veguladoniravivaxojubosam.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/budojimususebiniwovebuxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0377/2056/files/21730015607.pdf
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/matenoduwiwugides.pdf
    • https://cdn.shopify.com/s/files/1/0437/6743/1320/files/modewojitizagitomigarevex.pdf
    • https://cdn.shopify.com/s/files/1/0430/8896/9882/files/biliary_excretion.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/the_healing_anointing_kenneth_hagin.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/
    • https://cdn.shopify.com/s

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000acfe.bin
3a7ab24483eb44097ad58e9d8b575368df252ff5653c8ae0102c1d59db14ad81
pdf-font-stream PDF embedded font (sfnt) at offset 0xACFE 5240 bytes
font_01_sfnt_off0000bec5.bin
8424bcdf570dd7f5bc1cc2d9057fbf44e7a312f85e188911ae1f4a511097e901
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC5 14912 bytes