Malicious PDF — malware analysis report

Static analysis result for SHA-256 f582fedd0d8130ec…

MALICIOUS

PDF

50.5 KB Created: 2020-08-07 06:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35780bfbef78cb20a9525484348c8631 SHA-1: 0f31e6d1bdae0d2b0c57d5cfc32ebe14dc76f0b1 SHA-256: f582fedd0d8130ec26069bc41849554afd645f6080b9e05fd19af592a95ebdf1
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors, indicating a phishing or malicious content distribution attempt. The primary malicious URL identified is https://ttraff.cc/pify?keyword=betrayal+at+house+on+the+hill+widow+s+walk+haunts+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other PDF links, reinforcing the lure strategy.

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=betrayal+at+house+on+the+hill+widow+s+walk+haunts+pdf
    • http://zipaxoduk.acecric.org/uploads/1/3/1/4/131438405/6c387dcf23b3.pdf
    • http://files.irvinedodream.org/uploads/1/3/1/6/131637218/jelemuwakifev-pukozuledasose-novibuvob-wetix.pdf
    • http://files.spiteripottery.com/uploads/1/3/1/3/131381363/kigagugoparujo_xopanilepi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/new_born_baby_names_in_marathi_with_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/artisan_bundle_stardew.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0554/files/basifodopebebofivar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9590150980.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/xolibaxapuruzakovebut.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/gawefigapapasajovanog.pdf
    • https://cdn.shopify.com/s/files/1/0432/0971/9965/files/61729972513.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6837/files/guwejajuninoguvilexitagas.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/strange_cargo_1940.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/39896239762.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_off00008634.bin
4d37b1478d6583d8e684aedbdebde8c5e80607f8754b42ade943294663519196
pdf-font-stream PDF embedded font (sfnt) at offset 0x8634 5436 bytes
font_01_sfnt_off000098c2.bin
dfd44e214a80d4b6d357c7a0b4a1d76a0dfb2dd815dbdb0b38b0443e22e93f04
pdf-font-stream PDF embedded font (sfnt) at offset 0x98C2 10580 bytes