Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f786db6da6a03a…

MALICIOUS

PDF

44.7 KB Created: 2020-08-10 16:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2469cf18eae9b73335d3edcd1254c15c SHA-1: 3629f60b4d3d0ae5735e7c03ee22708b8ef004bb SHA-256: d5f786db6da6a03a33a62743e012e4b11e02789ab1459d782381c7f70ac9cbaa
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it's a redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=havells+ceiling+fan+catalogue+2020+pdf', which is also listed as a malicious redirector. The presence of a large number of external PDF links, many hosted on Shopify, suggests an attempt to manipulate search engine results or lure users to malicious content.

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=havells+ceiling+fan+catalogue+2020+pdf
    • http://files.champaignsoilandwater.com/uploads/1/3/0/9/130969428/jokavawoxo.pdf
    • http://files.ericphotography.net/uploads/1/3/0/8/130814208/kusefunetuf.pdf
    • http://files.nileswesttheatre.com/uploads/1/3/0/7/130740116/c109eace814a5ba.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/2582221175.pdf
    • https://cdn.shopify.com/s/files/1/0429/9427/0371/files/astro_diagnosis_max_heindel.pdf
    • https://cdn.shopify.com/s/files/1/0450/4626/8054/files/regebezoka.pdf
    • https://cdn.shopify.com/s/files/1/0435/4729/5898/files/247_bridge_game.pdf
    • https://cdn.shopify.com/s/files/1/0433/9066/4860/files/97455548690.pdf
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/functions_of_hrm.pdf
    • https://cdn.shopify.com/s/files/1/0429/7519/9391/files/kofesikubuzefakapabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1701/9292/files/81344274979.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/47155168912.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/rigekad.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/effects_of_air_pollution_on_vegetation.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/94134900182.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006757.bin
774b5d84323def9f5621ea6ca754e722e0a651292e01e46e4579aa68a0ab90ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6757 5520 bytes
font_01_sfnt_off00007a30.bin
8e16cf7eac02808ee3e9767dbfc349e18c73d62f57c8f75b43dc2e1fe2ab5985
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A30 14124 bytes