Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bba782f31f257e1…

MALICIOUS

PDF

49.0 KB Created: 2020-08-03 16:39:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02a51e01d6f79f4f127473d198dc6402 SHA-1: 4103915603f3f969a42f825962827a1e978b468e SHA-256: 0bba782f31f257e173dd0496550d0a7e347aab5b057638158d0f7ce6ca1e4909
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links, https://ttraff.cc/pify?keyword=effective+email+writing+skills+pdf, is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to the lure text and the malicious URL, indicating an attempt to trick users into clicking through to malicious infrastructure.

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=effective+email+writing+skills+pdf
    • http://files.secondsundayride.org/uploads/1/3/0/8/130874305/morune.pdf
    • http://files.silverrunceramics.com/uploads/1/3/2/7/132741029/zafijodimalasu-xiwetuzabosu-guxudu.pdf
    • http://files.sueannecelebrant.com/uploads/1/3/1/4/131437351/26ff42c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/dabemelebej.pdf
    • https://cdn.shopify.com/s/files/1/0440/8039/8486/files/rixitutuvejibedazisujoxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9471/2228/files/2589518942.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/how_to_limit_decimal_places_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0438/6524/3803/files/jipojolanoputisewipuzobuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7935/1976/files/disuteviliwu.pdf
    • https://cdn.shopify.com/s/files/1/0441/3833/2312/files/92901547371.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/mopos.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/fiwebobebowatipaxekavejo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9041/0658/files/60700934820.pdf
    • https://cdn.shopify.com/s/files/1/0429/1205/5463/files/mapigedolafefurofoxumap.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/77691435537.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/56953727718.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_off00008043.bin
e24795db158a092b456ba65781daa598e01a3c92f2683aff85ebcd12de9a3eee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8043 5648 bytes
font_01_sfnt_off00009386.bin
5d10e3c0ac71341311615bc1eb5e7f1197cc5ea8fa7242e18ffeeb55691932a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9386 10468 bytes

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