Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce54841aa240d545…

MALICIOUS

PDF

41.1 KB Created: 2020-08-26 15:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0996887d9fb7d1ceac0a9af469fc0699 SHA-1: cbf45222819db245dd09fcc6c8e9bf8b9714d5cf SHA-256: ce54841aa240d545afeb1ea5667d6eef4261cefa84b47609fa5b86017484ba5a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=microsoft+visual+basic+powerpacks+10'. Another critical heuristic identified a large number of external PDF links, suggesting a link farm. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and the malicious URL, reinforcing the attack pattern.

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=microsoft+visual+basic+powerpacks+10
    • http://rerumax.redmondmathblog.com/uploads/1/3/1/4/131438539/06935cf1.pdf
    • http://files.steelandgrain.com/uploads/1/3/0/7/130740462/2474242.pdf
    • http://xilojofaw.scottkelleycomedian.com/uploads/1/3/2/6/132681834/4651af4ac.pdf
    • http://vulub.pleis.us/uploads/1/3/1/4/131438304/guvozamuli_jupamusuzese_puwexudijarew_gozikajarox.pdf
    • http://jemitolep.mmsdesigner.com/uploads/1/3/2/6/132681946/aed843.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/sariwedewutokow.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9499/files/pilumimavaxoweruwadesaxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/7783/5681/files/kinipenizaloguweralafigo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7361/8599/files/23531873834.pdf
    • https://cdn.shopify.com/s/files/1/0428/6427/9718/files/fogotaxul.pdf
    • https://cdn.shopify.com/s/files/1/0432/1850/1799/files/mamikinodijido.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/zinetijolirib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57355052908.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/14499024572.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/zadabaxuvitojujatemeniva.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/the_ridiculous_6_movie_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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053a1.bin
c618c986c96723cf3a2ec1d0495c1510977900b9371467ffb110d775d862a979		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53A1 5340 bytes
font_01_sfnt_off000065fc.bin
c1a9cd9de244b0cf8caaf898523a9fa1dd7d0593c80510e007e21f7a993139ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FC 10364 bytes
font_02_sfnt_off00008978.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8978 4324 bytes

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